1400 Service Instructions

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HEHR INTERNATIONAL
www.hehrintl.com
1400 MODEL SERVICE INSTRUCTIONS
1.0 Introduction
The Hehr Model 1400 series windows were designed specifically for Low Floor buses but may be adaptable to other types of
busses. The Back Frame heights and widths differ based on the side and bay the window mounts in on the bus chassis. There are
15 defined models. The height (H), width (W), and vent opening height (OH) define the size of each window for all models.
See Model Listing (Drawing #1400-00) for a complete list of all Hehr part numbers. Following are the features of the Model 1400
Series:
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Square corner, low profile, flush design
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Designed for bonding in place
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Optional, open-able, transom
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Standard laminated safety glass or optional insulated glass
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Optional Hehr Care vandal shield on inside of glass.
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Non-egress or egress models with no visible latch hardware
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Driver's window has 2 sliders with laminated glass. The sliders are easily removable and replaceable.
2.0. Back Frames
The Back Frame is the outer window frame that is bonded to the bus side frame. The Back Frames for Egress windows and Nonegress windows are made from the same extrusion parts, however, there are different mechanical details for each type of window.
From the inside of the bus, Egress windows can be identified by the red Egress Handle on the inside left side of the Back Frame.
See figure 2 for component locations.
2.1 Non-Egress Windows
2.1.1 Window Removal/Replacement
There are two types of non-egress windows. The original design uses a hinge that is attached to the Egress Frame with screws.
The newer design uses a hinge that is extruded as pan of the top of the Egress Frame.
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2.1.1.1 Screwed-on Hinge
This type of window can be identified by a row of screws along the top of the Egress Frame on the outside. To remove this type of
window, remove all of the hinge screws. Also, remove two screws securing the Lock Blocks on the bottom of the Egress Frame to
the Back Frame on the inside. When this is done, the window should drop down in the Back Frame about 1/8th inch. If it doesn't
drop down on its own, it must be pried down so that it can be tilted out at the top under the hinge. Once it is tilted out, it can be
lifted out of the Back Frame to remove it.
2.1.1.2 Screw-Iess Hinge
This type of window can be identified because there are no screws along the top of the Egress Frame on the outside. To remove
this type of window, insert a putty knife in the bottom gap between the window frame and Back Frame about 10-1/2 inches from
the corner on either side (see figure 3). Push the Retainer down until the window can, be pushed out at the bottom. When one side
is released, do the same thing on the other side. When both Retainers are released the window can be tilted out (the same as an
Egress window). To remove the window, tilt it out and up past the 90° position (as shown in figure 4) and then push the window
in and down to disengage it from the Back Frame.
WARNING
An Inner Frame with a screw-Iess hinge cannot be installed in a Back Frame that had a screw-on hinge. The hinge features on
Inner Frame will not mate with the Back Frame hinge.
2.1.2 Retainer Replacement
There are also two types of non-egress window retainer systems. The original design had a Lock Block screwed to the bottom of
the window frame. The newer design uses a spring loaded Retainer that, when released, allows the window to open like a normal
egress window.
2.1.2.1 Screwed-on Mechanism
This type of mechanism is used only with the "screwed-on" hinge. To replace the Lock Block, remove the window frame as
described above in 2.1.1.1, and then remove the two screws that attach each Lock Block to the bottom of the window frame. To
install a new Lock Block simply re-install it with the two screws.
2.1.2.2 Spring Loaded Mechanism
This type of mechanism is used with the "screw-Iess" hinge. To replace the Retainer, open the window as described in 2.1.1.2.
With the window opened, remove the screw on the outside flange that holds the Retainer in (see figure 3). Once the screw is
removed the Retainer can be lifted out of the Back Frame channel. Be careful not to loose the two springs under the Retainer. To
replace the Retainer, reverse the sequence with the new part(s).
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2.2 Egress Windows
2.2.1 Window Removal/Replacement
There are also two types of egress windows. The original design uses the same screwed-on hinge described for the Non-Egress
windows. The newer design uses the screw-Iess hinge.
2.2.1.1 Screwed-on Hinge
This type of window can be identified by a row of screws along the top of the Egress Frame on the outside. To remove this type of
window, simply release the window with the Egress handle, tilt the window out and remove all of the hinge screws. When this is
done, the window can be removed. When re-installing the window, we recommend putting one screw in each end of the hinge to
hold it while installing the other screws. 2.2.1.2 Screw-Iess Hinge
This type of window can be identified because there are no screws along the top of the Egress Frame on the outside. To remove
this type of window, simply release the window with the Egress Handle. When released, the window can be opened out. To
remove the window, open it out and up past the 90° position (as shown in figure 4) and then push the window in and down to
disengage it from the Back Frame.
2.2.2 Egress Latch Replacement
If Egress Latch replacement is necessary, it should be replaced as an assembly. It is not recommended that individual parts be
replaced in a Latch assembly. To replace a Latch, open the Egress window with the Egress Handle. With the Latches released,
open the window until the Latches are accessible in the bottom of the Back Frame. Remove the two screws securing the latch
assembly to the Back Frame. The Release Cable must be disengaged from the Latch. To do this, first disengage the spring from
the Latch so it can rotate up out of the way (see figure 5).
Next, disengage the cable from the Latch notch. The Latch assembly can then be lifted out of the Back Frame. When replacing the
new Latch assembly, reverse this sequence. 2.2.3 Egress Handle Replacement
Egress Handle replacement is very difficult on a Back Frame installed in a bus. It should be avoided if possible.
To replace an Egress Handle, remove the Slot Cover (next to the Handle, see figure 2). Next, rotate the Handle out to the release
position, so that the screw that secures the Cable to the Handle is visible.
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Warning
The Cable is connected to a spring. Before removing the screw, something must be attached to the Cable (we recommend a wire
wrapped around the Cable next to the eyelet) so it cannot be pulled back into the Back Frame when the screw is removed.
Once the Cable is secured with a wire, remove the screw. Next, remove the Handle pivot screw (use a wrench in the slot on the
nut and a screw driver on the screw head from the inside with the window open). Remove the damaged parts, and replace them
with new ones. Be careful to replace the pivot parts in same order as they were originally assembled (refer to the Assembly
drawing for the model if the order is not remembered).
2.2.4 Cable Replacement
Cable replacement is very difficult on a Back Frame installed in a bus. It should be avoided if possible.
To replace a Cable, the new Cable must be pulled through the Back Frame with the old Cable. If the old Cable is broken, so that it
cannot be used to pull the new Cable through the Back Frame, the Back Frame must be removed from the bus.
If the old Cable is not broken, remove both Latches as described in 2.2.2. Secure a wire on the old Cable near the Handle as
described in 2.2.3. Remove the screw in the Handle that secures the Cable. Attach the looped end of the new Cable to the eyelet
end of the old Cable (near the Handle, a small piece of wire is recommended).
The Cable Spring can be seen from the inside in the bottom right side of the Back Frame with the window open (see figure 2).
Attach a wire to the loop end of the old Cable (where the spring hooks on to it). Remove the screw securing the Spring to the Back
Frame. Disconnect the Handle end of the Cable, and pull the Spring end of the old cable, pulling the new Cable through the Back
Frame. When the new Cable is pulled through, attach the Spring (a new one may be used) to the new Cable and attach the Spring
to the Back Frame with the same screw that was removed. Lastly, attach the eyelet end of the new Cable to the Handle with the
screw removed from the Handle.
2.2.5 Window-open Switch Adjustment
The switch is located in the upper left corner of the Back Frame (viewed from the inside, see figure #2). To check switch
operation, release the Egress window latch and let the window swing out to its normal hanging position. The switch should open
(as indicated by the Open Window warning light/buzzer or by an Ohm meter). If the switch does not open, it is too low (too close
to the window). Open the window to about 45° so you can get to the switch. Bend the Switch Bracket up (away from the window)
until it opens when the window is in its normal hanging position.
If the switch is open before the window is opened, it is too high (too far from the window). Again open the window to about 45°
and bend the Switch Bracket down (towards the window) until it works properly. Only bend the Bracket by small amounts (about
1/32 inch) until proper operation is achieved.
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2.2.6 Window-open Switch Replacement
To replace the switch, open the window far enough so that you can get to the 2 screws securing the Switch Bracket to the Back
Frame top. Remove the screws, and drop the Switch and Bracket down. Cut the leads coming out of the rubber grommet, but leave
the wires long enough so that you can splice the wires to the new switch wires. Remove the half nut securing the Switch to the
Bracket, install the new Switch, and splice the wires. Re-install the Switch and Bracket. Test and adjust the Switch per section
2.2.5.
3.0 Egress Frames
3.1 Solid Window
"Solid window" refers to the fixed window portion of the Egress Frame. The solid window is a single piece of glass glazed into
the Egress Frame. A "full fixed" window does not have a Transom (upper, tilt open, window). They do not have a mullion like
windows with transoms. Some "full fixed" windows may be used for destination signs. The sign is simply mounted in the upper
portion of the window.
3.1.1 Glass Replacement
The "solid window" glass may be replaced while the window is mounted in the bus, but it is much easier to replace it on the bench
after removing the window frame as described in section 2.1. Remove the Inner Frame Seal from all four sides (note which Seal
comes from which side). This is done by prying under the outer edge of the Inner Frame Seal as shown in figure 6, view 5. When
all four sides are removed, remove the old glass from the window frame. Then clean any dirt, caulking, or debris from the inner
surface of the Front Seal to insure good contact with the new glass.
To re-glaze the window, install the new glass, and re-install the Inner Frame Seals on the same side they were originally installed
in. They are "snapped" in with a mallet, striking the Seal as shown in figure 6, view 2. When all the Seals have been re-installed,
the window may then be replaced in the Back Frame (if it was removed).
3.2 Transoms
3.2.1 Remove/Replace
From the inside of the bus, open the Transom. Remove the four screws in the top of the Transom that secure the Props to the
Transom (see figure 2). When the screws are removed, the Transom can be rotated farther towards the inside, At about 800 the
Transom can be disengaged from the Hinge. To replace the Transom, reverse the sequence.
3.2.2 Glass Replacement
We recommend that Transom assemblies be spared and replaced as complete units. The Transom assembly part number is given
in the Recommended Replacement Parts List.
3.2.3 Latch Replacement
Latches should be replaced as complete Latch Assemblies. Do not attempt to replace individual parts in a Latch. From the inside,
remove the 2 screws that secure the Latch assembly to the Transom (see figure 2). There are also 2 screws securing the Latch
Catch to the Egress Frame Top.
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3.2.4 Prop Replacement
There are 4 screws securing the Prop ball end Retainers to the Egress Frame and Transom (see figure 2). Remove these screws to
remove a Prop. To install a new Prop re-install the ball end Retainers (2 each end) and the 4 screws.
3.3 Hehr Care Glass Protector
The optional Hehr Care inner protective plastic cover is designed to provide a replaceable inner surface to protect against graffiti
and scratching of the glass.
3.3.1 Removal
From the inside, with the window closed, remove the soft vinyl Wedge Seal by pulling it towards the center of the window (see
figure 6, views 4 & 5). When the Wedge is removed, the plastic cover can be removed for cleaning or replacement.
3.3.2 Plastic Replacement
Install the new plastic panel and re-install the Wedge. The Wedge is installed by pushing it in with finger tips and/or a glazing
roller like the one shown in figure 6, view 3.
4.0 Drivers Window (1451)
The driver's window is what is called a top "T" slider window. It has two sliders, and a bottom stationary window. The See figure
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4.1 Slider Replacement
The sliders cannot be removed from the driver's window when it is installed in the coach. To replace the sliders the entire driver's
window must be removed from the coach. Both sliders can be removed from the Driver's Window Back Frame by removing the 4
screws that secure the top corners of the Back Frame. Once the screws are removed the top can be separated from the sides to
permit access and replacement of the sliders. The inner and outer sliders are not interchangeable .
4.1.1 Glass Replacement
We recommend that the Inner and Outer sliders be spared and replaced as complete assemblies. We do not recommend changing
the glass in an existing Slider Frame. The Slider assembly part numbers are given in the Recommended Replacement Parts List.
4.1.2 Latch Replacement
There are 2 screws in each Latch and in both Latch Catches. Simply remove the 2 screws from the inside to replace any of the
parts. We recommend that Latches be spared and replaced as complete assemblies. Do not attempt to replace individual parts in a
Latch.
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Recommended Replacement Parts List
See Bill of Materials for each model number for a complete listing of all purchased and fabricated part numbers. As a minimum,
the parts listed below may be purchased for spares. The installation/replacement of these parts is discussed in the Service
Instructions above.
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Figure Lists:
1 1400-10 Model Listing
2. Side Window Component Locations
3. Releasing Retainer with a putty knife
4. Opening & Removing Egress Frame
5. Disengaging spring from the latch
6. Glazing System, Installation/Removal
7. Driver's Window Component Locations
EGRESS WINDOWS
Standard
EGRESS WINDOWS
Insulated glass: Stationary
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NON-EGRESS WINDOWS
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1. WINDOWS ARE VIEWED FROM OUTSIDE.
2. WINDOWS ORDERED BY OVERALL OUTSIDE DIMENSIONS
“H” = HEIGHT, AND “W” = WIDTH.
3. SIZE LIMITATIONS:
HEIGHT: 48.000 INCHES
WIDTH: 62.000 INCHES
4. STANDARD GLAZING MATERIAL:
5MM/6MM TEMPERED, OR
5MM/6MM LAMINATED, OR
16.25MM INSULATED (OUTER=5MM, SPACE=.250, INNER=5MM)
5. WINDOWS ARE PRE-TESTED PER FMVSSS-217 SPECIFICATION AND HEHR INTERNATIONAL REQUIREMENTS.
6. FINISH COLOR: BLACK PAINT IS STANDARD.
7. EGRESS HANDLES LOCATED ON R.H. SIDE ONLY, AND 25.00” UP FROM BOTTOM OF THE WINDOW.
8. HEHRCARE GRAFFITI SHIELD AVAILABLE ON FULL OR LOWER STATIONARY GLASS, AND SLIDERS
9. AN “A” IN THE PART NUMBER “HAND” COLUMN, INDICATES THE TRANSOM SHALL HAVE A 30° OPENING
(THE STANDARD ANDLES IS 14°).
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SIDE WINDOW, COMPONENT LOCATION
FIGURE 2
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RELEASING RETAINER FIGURE 3
OPENING & REMOVING EGRESS FRAME. FIGURE 4
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DISENGAGE CABLE FROM LATCH. FIGURE 5
STATIONARY GLAZING SYSTEM
INSTALLATION/REMOVAL PROCESS FIGURE 6
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DRIVER’S WINDOW, COMPONENT LOCATION. FIGURE 7